Steel bridge framework installing and welding method

Abstract

The invention relates to a steel bridge framework installing and welding method. Steel pipes, reinforcing boards, first material boards and second material boards are included; a steel bridge framework is square; opposite corners inside the steel bridge framework are connected; welding beads of the four first material boards are reserved to be spliced on the outer sides of the steel pipes; the interval angles of the four first material boards are the same; the steel pipes are spliced on reserved welding beads on the outer sides of the four first material boards; the four second material boards are added between the four steel pipes on the outer sides; the reinforcing boards are inserted between the adjacent material boards; a reversible deformation welding procedure is adopted, the steel bridge framework is fixed in a spot welding mode through CO2 gas shielded welding, horizontal welding is conducted, every two welding beads fall into one set, and the welding beads are sequentially welded; the welding bead space is narrow, and horizontal welding is conducted through manual arc welding. Deformation in the manufacturing process of the steel bridge framework is reduced through the reasonable assembly sequence and the reversible deformation welding procedure, the welding requirements are met, the quality and the time limit for the project of the steel bridge framework are ensured, the quality of a steel bridge is ensured, waste of raw materials of the steel bridge is reduced, unnecessary procedures are avoided, and funds are saved.

Description

technical field [0001] The invention relates to the technical field of assembling and welding, and specifically proposes a method for assembling and welding steel bridge frames, which is mainly used for assembled steel bridges. Background technique [0002] In recent years, with the rapid development of cities and economies, my country's urban road and bridge facilities have developed rapidly, especially steel structure bridges. The load-bearing capacity of a steel structure bridge depends on the quality of the welded steel bridge frame. When welding the steel bridge frame, the residual deformation and stress of the weldment usually exist at the same time. The residual deformation in the general welding structure changes the size of the weldment or parts and cannot be assembled, making the entire component lose stability and unable to bear the load, making the product The quality is greatly reduced, and correction requires a lot of energy and material resources, sometimes r...

AI Technical Summary

Problems solved by technology

When welding the steel bridge frame, the residual deformation and stress of the weldment usually exist at the same time. The residual deformation in the general welding structure changes the size of the weldment or parts and cannot be assembled, making the entire component lose stability and unable to bear the load, making the product The quality is greatly reduced, and the correction needs to consume a lot of energy and material resources, sometimes resulting in product scrapping

The performance of some metals is greatly reduced due to the residual stress after welding, which causes difficulties in the production of welded parts of such metals and causes a lot of waste

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